Choose a mattress that fits.
Match the mattress to your frame, leave room around the whole bed, and check how the mattress reaches your bedroom.
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Common U.S. mattress sizes
Nominal mattress sizes in inches. Actual dimensions can vary by brand; check the listing and your frame’s specifications.
| Size | Width × length |
|---|---|
| Twin | 38 × 75 in |
| Twin XL | 38 × 80 in |
| Full | 54 × 75 in |
| Queen | 60 × 80 in |
| King | 76 × 80 in |
| California king | 72 × 84 in |
Browse by size
These links open Amazon search results so you can compare available mattresses. They are not tested product recommendations.
One sleeper, different lengths
38 × 75 in or 38 × 80 in
Typical size to test, not a listing specification
Twin XL adds 5 inches of length. Check the frame and sheet label: standard twin sheets may not fit Twin XL.
Browse twin & twin xl on Amazon ↗Compare floor space before upgrading
54 × 75 in or 60 × 80 in
Typical size to test, not a listing specification
A queen adds 6 inches of width and 5 inches of length over a full. Check the bed frame’s outside dimensions as well.
Browse full & queen on Amazon ↗Check width versus length
King 76 × 80 in; California king 72 × 84 in
Typical size to test, not a listing specification
A California king is narrower and longer than a standard king. Confirm the exact frame, sheets and delivery package.
Browse king sizes on Amazon ↗Before you buy
- Measure the inside of your bed frame and the outside footprint of the full bed, including the headboard.
- Check mattress height against your frame, sheets and preferred height to get in and out of bed.
- Review the listing’s materials, trial and return terms, delivery box size and expansion instructions.